2. 外语
  3. Today, most countries in the world have canals. Many countries have built canals near the coast, and parallel【C1】______the coast

Today, most countries in the world have canals. Many countries have built canals near the coast, and parallel【C1】______the coast

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问题     Today, most countries in the world have canals. Many countries have built canals near the coast, and parallel【C1】______the coast. Even in the twentieth century, goods can be moved more cheaply by beat than by any other【C2】______of transport. These【C3】______make it possible for beats to travel【C4】______  ports along the coast without being【C5】______to the dangers of the open. Some canals, such as the Suez and the Panama, save ships weeks of time by making their【C6】______a thousand miles shorter. Other canals permit boats to reach cities that are not【C7】______on the coast, still other canals【C8】______lands where there is too much water, help to【C9】______fields where there is not enough water, and【C10】______water power for factories and mills. The size of a canal【C11】______on the kind of boats going through it. The canal must be wide enough to permit two of the largest boats using it to【C12】______each other easily. It must be deep enough to leave about two feet of water【C13】______the keel of the largest boat using the canal. When the planet Mars was first【C14】______through a telescope, people saw that the round disk of the planet was criss-crossed by a【C15】______of strange blue-green lines. These were called "canals"【C16】______they looked the same as canals on earth【C17】______are viewed from an airplane. However, scientists are now【C18】______that the Martian phenomena  are really not canals. The photographs【C19】______from space-ships have helped us to【C20】______the truth about the Martian "canals".
【C3】
选项 A、waterways
B、waterfronts
C、channels
D、paths
答案A
解析 waterway“水道”；waterfront“城市的滨水区”；channel“海峡”；path“小路”。
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